Better yet, the pfields should be variants; each pfield should be allowed to be any one of a predefined set of types that would at least include int, real, boolean, string. I would not want to get too fancy with this!

boost::any provides an efficient, easy to use encapsulation of this kind of facility in C++, which is another argument for moving the Csound internals from C to C++. I don't want to wait around for weeks or months while people hammer out some implementation in C of what already works perfectly in C++.

Regards,
Mike

-----Original Message-----
>From: Victor Lazzarini 
>Sent: Apr 27, 2007 4:40 AM
>To: Developer discussions 
>Subject: Re: [Cs-dev] more than one string in an i-statement
>
>I think we should have a plan for a change in the API. Perhaps we
>should wait for other changes before doing, so they are all done
>in one go. So, for now, we don't do anything, but add this to a list
>of future API changes. When that list is big enough or there is a
>good reason for modifying the API, then we will do it.
>
>
>At 02:42 27/04/2007, you wrote:
>>Please keep in mind that if you change the EVTBLK structure to allow for
>>more than one string, then you will also need to change the EVENT structure
>>in cscore.h which is part of the Cscore API.  This will be an incompatible
>>change to the API (our first) and will require the API version number to be
>>increased to 2.0.  Increasing the API major version will require all host
>>applications that dynamically link to Csound to be recompiled even though
>>this change will likely not affect them.  Existing user cscore programs will
>>all need to be recompiled and will likely crash if they are loaded with the
>>new library.
>>
>>None of this means that we should not make this improvement.  But these are
>>the consequences of this particular change unless you can think of a way to
>>avoid changing EVTBLK.
>>
>>If you do change EVTBLK, I would suggest that we do away with the "magic
>>number" (*) for indicating a string p-field and instead have an array of
>>bools.  I have not yet been able to cause anything really bad to happen as a
>>result of this hack but the CSD below certainly could be considered to
>>behave a little "strangely".
>>
>>Also, I don't know if we can save space by using a union { char * ; MYFLT }
>>for each p-field but that may not be a good idea either if it changes how
>>Cscore users access p-fields from their code.
>>
>>Anthony
>>
>>
>>
>>sr      = 10
>>kr      = 10
>>
>>instr 1
>>         print   p4
>>   ifile fiopen  p4, 1
>>endin
>>
>>
>>
>>
>>i1 0 1 "test string"
>>i1 1 1 3945467
>>e
>>
>>
>>
>>
>>* By the way, did the magic number (SSTRCOD) change between Csound 4 & 5 or
>>has it changed since Csound 5.00 was released?  I thought that it used to be
>>1048576 and it is now 3945467.  Am I confused?
>>
>>Victor Lazzarini wrote on 4/26/07 11:35 AM:
>>
>> > Yes, more than one string in an i-statement should be enabled,
>> > that should be one of the items in the to-do list. At the moment the data
>> > structure that holds i-statements has only one slot for strings, so
>> > I suppose that's where we should start.
>>
>>
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>
>Victor Lazzarini
>Music Technology Laboratory
>Music Department
>National University of Ireland, Maynooth
>
>
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